Tri Basic Lead Sulphate (TBLS) is a versatile inorganic compound, appearing as a white to slightly yellow powder. With the chemical formula Pb4O(SO4)3, it is primarily used in the PVC industry as both a stabilizer and a pigment. TBLS is renowned for its excellent thermal stability, maintaining its structure even under high-temperature conditions. Its outstanding weatherability, including resistance to moisture, UV light, and temperature fluctuations, makes it particularly suitable for outdoor applications. Compared to other lead-based compounds, TBLS offers lower toxicity, enhancing its safety profile. As a PVC stabilizer, it is ideal for high-temperature processing, while as a pigment, it provides color and opacity to a wide range of industrial products.